diff options
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index f0d5be9dc736..d78e294698b0 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -4198,6 +4198,26 @@ static inline void clear_page_guard(struct zone *zone, struct page *page, unsigned int order) {} #endif /* CONFIG_DEBUG_PAGEALLOC */ +#ifndef clear_pages +/** + * clear_pages() - clear a page range for kernel-internal use. + * @addr: start address + * @npages: number of pages + * + * Use clear_user_pages() instead when clearing a page range to be + * mapped to user space. + * + * Does absolutely no exception handling. + */ +static inline void clear_pages(void *addr, unsigned int npages) +{ + do { + clear_page(addr); + addr += PAGE_SIZE; + } while (--npages); +} +#endif + #ifdef __HAVE_ARCH_GATE_AREA extern struct vm_area_struct *get_gate_vma(struct mm_struct *mm); extern int in_gate_area_no_mm(unsigned long addr); |